package durst.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import durst.action.CalendarContext;

public class LoginFilter implements Filter {
	private FilterConfig filterConfig;

	@Override
	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) resp;

		if (CalendarContext.getAccount(request, response) != null)
			chain.doFilter(request, response);
		else
			response.sendRedirect(filterConfig.getServletContext().getContextPath() + 
					filterConfig.getInitParameter("login_page"));
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		filterConfig = config;
	}

	@Override
	public void destroy() {
	}
}
